- worcester



Nov. 9 1926.

. 1,606,071 A. A; GORDON DELKYING DEVICE FOR WEFT ns'rscrons 2 Sheets-Sheet 2 Nova 9, 192th eann ALBERT A GORDON, F \VORCESTER, MASSACHUSETT$ ASSIGNOB TO OBOMI TON 6s ialvownss oon: won-ri ts, or wfoncnsrnn, MASSACHUSETTS, A comaonnrroiv or raassaoizusnr'rs.

DELAYING-DEVIGE FOB DETECTQRS.

Application fille d July 1, 1925. SeriaLN o. 40,325.

This invention relates to Weft detectors as used on automatic weft replenishing looms. Such detectors operate to determine substantial exhaustion of Weftin the active shuttle, as is well understood by all skilled in the .art. 4'

In certain two shuttle work, such as the weaving of crepe, two different kinds of filling are used and the shuttles are shifted after everytwo'piclzsare inserted, .so that two picks of one-kind of filling alternate with two picks of the other kind of filling. In certain weaves,'botli fillingsinay the of the same color but one filling may be right hand twist and the other left handtwist.

Such filling isofrequent'ly very fine and delicate and it 'hasbeenifound that repeated or discolor the filling. Consequently it has been found desirable to hold theweft detector out of action forpredetermined periods, to thereby reduce the f number of contacts with the filling and preventinjury thereto. l

Devices have beenhereto-fore provided by which separate COUIliiIlglTlGCllfihiSlll is provided foneach shuttle, so .thatth number of picks between operations of the detector may be separately determined for each shuttle while it is in active operation. :S'uch mechanism is more or "less complicated, however, and it is the object of 'my present invention to provide an improved and simplified mechanism for holding the detector inoperative, so constructing the device that the detector will become operative whenever the bobbin in either shuttle approaches exhaustion.

For the attainment of this object, 1 provide means for holding the detector out of action and I also provide a delaying device so that thefliolding means must b engaged. twice in succession by substantially *l'ulfbobbins in order to render "the Weft detector inoperative;

l1" engaged once .by a full bobbin and then by a bobbin v approaching exhaustion, the holding deviceis put out-"ofaction and will remain out of action .until the "substantially exhausted bobbin is replaced. *My invention turther relates to arrange positionshown in Fig. 18, and contact with the weft detector may 1n ure nents and combinations of parts which Will behere'inafter described and more particu- Figfil isa planview of a welt detector having .iny improvements applied thereto;

2 is a sideelevationthereohlooking in the directionotthe"arrow/ 2 thing. 1;

Fig. 3' teas enlarged sectional front ele- \iittlOlhtfllRh along the line in Fig. 1; Figs. ite 8 inclusive are partial side elevations, showing' clifiere1it successive positions of the delaying'device, when engaged successivelybytwo fnll bobbins;'

' parts in the Fig. 9lis a 'planviewof the Figs. lOIto llinclusive are partial side elevations of the' delaying device, showing theoperationjthereof when engaged first by a full bobbinand then by 'abobbin app a hins h isti' I Referring particularly to Figs. 1 and 2,

I l have shown f a jweft detector er the sideslip type Iyvhichiisih general of a usual 'wnstr c e E11 .to slide ina vstud For bearing 21 which is letecto'r is mounted irotatablymounted ina stand 22 secured to a portion or the looin -t'ra ne 23. At its rear ,endithe. detector 20 i's 'sl i'da'blelaterally in 'arecess 24L 2) formed in anupwardly projecting portion .o'fthe staridQQ, pro- ;vided-with a cap or cover plate 25.

A cross bar126 isthreaded on the de tector :20 and is held in adjusted position thereon bya lock nut 27. A springer en- .gagesfthe nut27 at one end and, the studfil at; the opposite end and yieldingly forces fthe'detector rearward. hen. the detector engages a substantially exhausted bobbin, its angular position causes it .to' slide along toward the tip of i the bobbin, carryi g "the cross bar-26 with it andeausingengagement thereof with the rear end portion 30 f'oit a The rodisfnorma'lly withdrawn out of the path'of L11. tCt-L1%if01:36, as; indicated in l ll ' shuttle.

Fig. 1, but is projected into the path of the actuator when the end 3-0 of the bell crank is engaged by the cross bar 26. A coil spring 37 is seated in a socket 36 on a bracket 39 and engages lug or projection 40 on the bell crank toyieldingly move the parts to the position shown in Fig. 1. An adjustable set screw 40 limits this movement. ll hen the indicating rod 35 is projected beneath the actuating lever 36, the weft replenishing mechanism is placed in operation.

The parts thus far described are or may be of substantially the usual construction and in themselves form no part of my present invention, which relates particularly to a device for holding the detector out of action for a predetermined period, in connection with mechanism for delaying the operation of said holding device.

The holding device comprises a hook 41 pivoted at 42 on the bracket 39 secured to the stand 22. A coil spring 42 acts to move the hook 41 yieldingly downwardly.

The hook 41 is raised to release the detector at every bobbin transfer and is connected by a link 43 to a counting device (not shown) by which the hook is raised periodically to release the weft detector. Such l counting device are well known in the art and form no part of my present invention. For a description of one such device, reference is made to the prior patent to Stimpson No. 1,518,230, issued December 9, 1924.

The hook 41 is designed to engage the cross bar 26 under certain conditions and to thus hold the detector 20 forward out of position to engage the bobbin in the running 1 will now describe my improved devices for delaying and controlling the operation of the book 41.

For this purposel provide a slide 45 positioned on the stand 22 by guide members 46 and 47. The member 46 is a fairly close sliding it for the slide on all sides thereof, but the member 47 permits substantial lost motion in a vertical direction so that the rear end of the slide 45 can move freely up and down within certain limits. The front end of the slide 45 is ofiset, as indicated at 48, and is positionedfor engagement by the front end of the detector 20 as it is forced forward by engagement with a bobbin in the running shuttle. A light spring 49 (Fig. 1) acts to yieldingly draw the slide 45 rearward.

The rear end of the slide 45 is notched to provide a shoulder 50 (Fig. 2) for a purpose to be described. A cam plate 51 has a stud 52 pivoted on the slide 45, and studs 53 and 54 in the slide 45 limit angular movement of the plate 51. The hook 41 has on its outer side a lug 55 which engages the cam plate 51. The pivot stud 5-2 for the plate 51 extends freely through the slide 45 and is provided with a very light coil spring 56 which acts to yieldingly move the cam plate to the raised position shown in Fig. 2.

Having described the details of construction of my invention, I will now describe the operation thereof. I will first describe the sequence of operations when the weft detector is successively engaged by two full weft carriers or bobbins. The normal position of the parts is indicated in Fig. 4, with the cam plate 51 extending under the projection 55 on the hook 41 and with the end of the hook resting upon the rear end of the slide 45. The rear end of the slide is also slightly elevated and rests upon the cross bar 26 which is attached to the detector 20.

The next step in the sequence of operations is indicated in Fig. 5, when the detector 20 is engaged by a full bobbin B. The detector is pushed forward and engages the offset forward end of the slide 45 (see Fig. 1) carrying the slide 45 forward to such an extent that the rear end of the slide is withdrawn from beneath the hook 41. This allows the hook to drop, slightly depressing the cam plate 51, but the hook is still held in partially raised position by the engagement of the cam plate with the lug 55.

As the detector 20 is thus moved forward, the cross bar 26 also moves forward and re mains under the rear end of the slide 45.

As the lay moves rearward, (Fig. 6) the weft detector 20 also moves rearward, with drawing the cross bar 26 from beneath the slide 45. The hook 41 engages the rear end of the slide 45 but cannot move down to position to engage the cross bar 26.

In Fig. 7, l have shown the detector 20 en gaged by a second full bobbin B which has forced the detector 20 and crossbar 26 forward, moving the cam plate 51 from beneath the lug 55 and permitting the hook 41 to descend to its operative position.

As the lay thereafter moves rearward a second time, as indicated in Fig. 8, the hook 41 engages the cross bar 26 and holds the detector out of operation until the hook is raised after a predetermined number of picks by the counting apparatus (not shown).

Subsequent repeated slight engagements of the weft detector 20 by the bobbins B or B may cause the detector to slip sidewise as indicated in 9 to a position in which it is not engaged by a bobbin.

After the predetermined number of picks of the loom, the hook 41 is raised above the bar 26 and also above the plate 51 and the partsreturn to the normal position indicated in Fig. 4. If the bobbins B and B- still retain a sufficient supply of yarn, no transfer is initiated and the sequence of steps above described (Figs. 4 to 8) is repeated, putting the detector out of action for another period.

In Figs. 10 and 14 inclusive, I have indicated the operation where the weft detector lit) is engaged successively by a full boboin and by a bobbin approaching exhaustion.

In Fig. 10, the parts are in the normal position and in Figs. 11 and 12 the parts are shown in the successive positions caused by engagement with a full bobbin B, Figs. 10, 1.1 and 12 being identical with Figs. l, 5 and 6 previously described. 7

In Fig. 13, the detector 20 is engaged by a bobbin B approaching exhaustion and having very little weft left thereon. Such engagement causes the detector 20 to be forced forward a distance sufi icient to withdraw the plate 51 from beneath the lug 55, but not sufficient to withdraw the cross bar 26 from beneath the hook/i1. As soon as the plate 51 is withdrawn from the lug 55, the plate is moved upward by the coil spring 56 to the raised position indicated in Fig. 13, so that its inclined face 57 will be engaged by the lug 55 upon rearward movement of the slide l5.

As the bobbin B moves rearward, asindicated in 14, the cross bar 26 is also free to move rearward, as the cam plate 51 engages the inclined upper side of the lug. b5 and is raised to the position shown in Fig. 14, carrying with it the slide d5, which is thus raised out of the path of the cross bar 26.

lhe parts continue in the relation inclicated in Fig. 14-, until the bobbin B is ejected and replaced by a full bobbin. Nhen such transfer occurs, the hook 4:1 is raised by the counting device in the usual manner and the parts are restored to the position indicated in Fig. lor Fig. 10.

Having thus described the details of op eration of my invention, it will be seen that I have provided an exceedingly simple mechanism by which the counting device will be placed in operation when two full bobbins are in use, but will be held out of operation whenever either bobbin is approaching exhaustion. By this construction, the operation of the counting device for two shuttles used alternately iscontrolled by a much simpler mechanism than has been heretofore considered necessary.

Having described the construction and operation of my invention, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is l. In a loom, a weft detector, means to hold said detector out of'operative position,

said detector being periodically released from said holding means, and means to thereafter positively and definitely delay the renewed operation of said holding means after such release until after a predetermined minimum number of shuttle flights.

2. In a loom, a weft detector, means to hold said detector out of operative position, said detector being periodically released from said holding means, and means to thereafter positively and definitely delay the renewed operation of said, holding .ineans after such release until the occurrence of two consecutive engagements of said detector by bobbins having suiiicient weft thereon.

3. In a loom, weft detector, means to hold 7 said detector out of operative position, and

.means to delay the operation of said holdingmeans, .said holding means receiving a preliminary setting when said detector is engaged by a bobbin having sufficient weft therein and being rendered fully operative after such release, said holding means being retained inoperative by engagement of said detector during'said period of delay by a bobbin approaching exhaustion.

5. In a loom, a weft detector, means to hold said detector. out of operative position, 7

means to delay the operation of said holding means, said delaying means comprising a slide engaged by said detector as it is pushed forward and a cam plate on said slide controlling the position of said holding means.

6. In a loom, a weft detector, means to hold said detector out of operative position, means to delay the operation of said holding means, said holding means comprising a hook mounted on a fixed pivot and having a lug thereon, and said delaying means comprising a slide positioned for engagement by said detector on its forward movement and a cam plate pivoted on said slide and engaging said lug.

7. In a loom, a weft detector, means to hold said detector out of operative position, and means to delay the operation of said holding means, said holding means comprising a hook mounted on a fixed pivot and having a lug thereon, and said delaying means comprising a slide positioned for engagement by said detector on its forward movement and a cam plate pivoted on said slide and engaging said lug, said slide bein guided longitudinally and having limited upward movement at its rear end.

8. In a loom, a weft detector, means to hold said detector out of operative position, and means to delay the operation of said holding means, said holding means compris ing a hook mounted on a fixed pivot and having a lug thereon, and said delaying means comprising a slide positioned for enill) lid

gageinent by said detector on its forward movement and a cam plate pivoted on said slide and engaging said lug, said cam plate having a relatively light spring acting to yieldingly raise said plate.

9. In a loom a weft detector having a cross bar, means to hold said detector out of operative position said means comprising a hook mounted to engage said cross bar and a device to delay the operation of said holding means, said delaying device being effective to prevent engagement of said hook and crossbar until twice engaged successively bv bobbins having substantial supplies of weft thereon.

10. In a loom, a detector, a hook mounted to engage said detector and to hold said detector inoperative, and a slide engaged by said detector and controlling said hook, said slide requiring successive engagement of said detector by two bobbins, each having a substantial supply of weftthereon.

11. In a loom, a detector, a hook mounted to engage said detector and to hold said detector inoperative, and a slide engaged by said detector and controlling said hook, said slide having a cam plate normally holding said hook elevated and said slide requiring two successive forward movements thereof by engagement of said detector with bobbins having substantial supplies of weft thereon to completely withdraw said cam plate from operative position.

12. In a loom, a detector, a hook mounted to engage said detector and to hold said detector inoperative, and a slide engaged by said detector and controlling said hook, said slide having a plate pivoted thereon with a cam-like lower surface which engages a lug on said hook and thereby elevates said slide from holding position after said detector has been engaged by a bobbin approaching exhaustion.

13. In a loom, a weft detector, means to hold saiddetector out i operative position, and a delaying device for said holding means jointly controlled by the bobbins in two shuttles inserting two picks alternate- 1y, said delaying device being held inoperative whenever either bobbin approaches weft exhaustion.

In testimony whereof I have hereunto atfixed my signature.

ALBERT A. GORDON. 

